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Introduction to Whole Numbers and Integers Numbers can be used for many different purposes. The cost of a house is a number that mathematics can be performed on to obtain some new amount. For example: Vendor wants a quick sale, was $500 000, now $495 000. However, some numbers are never used mathematically such as your postcode, your telephone number or the level number in a building. This module is about numbers that we want to do mathematics on. Two groups of numbers are referred to: The whole numbers are 0,1,2,3,4,5,...... (where …… means going on forever). The integers (Pronounced in‐te‐gers) are all the whole numbers plus the negative numbers, represented as: ..... 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5,....... . A number line representation of integers is below. -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 Centre for Teaching and Learning | Academic Practice | Academic Skills T +61 2 6626 9262 E [email protected] W www.scu.edu.au/teachinglearning Page 1 [last edited on 17 March 2015] CRICOS Provider: 01241G